The pillow covers printed with shichigoro-shingo’s illustrations are sold on ArtofWhere which is an online shop of custom fabric, pillow covers and hats based in Canada.
Size: 18″x18″, Back color: Black.
There are four other types in addition to above “toys”.
Please check shichigoro’s page on ArtofWhere.
shichigoro (ArtofWhere) 
Please check the site if you are interested. The pillow covers and hats printed with artworks of various artists are sold.
www.artofwhere.com